The International Brotherhood of Electrical Workers said Connecticut Light & Power’s recent decision to use contract workers for a majority of the repairs violates its collective bargaining agreement.

The contract workforce, which currently handles all work after 3 p.m. Monday through Friday and during all weekend hours, will actively preclude union electrical workers from handling the majority of the company’s repair calls.

According to Frank Cirillo, business manager of IBEW Local 420, the current contract breaches the terms of a 1.5 year agreement between the company and the union.